Safe T Net 2000 Operator’s Manual T Net 2000.pdf · 2 71-0019 - REV G Safe T Net 2000 Operator’s Manual Features • Accepts one or two channels of standard 4 to 20 mA analog

Safe T Net 2000Operator’s Manual

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PROPRIETARY STATEMENT

Thermo GasTech owns proprietary rights in the information disclosed within. By receiving this document, the recipient agrees that neither this document nor the information disclosed within nor any part shall be reproduced or transferred to other documents or used or disclosed to others for manufacturing or for any other purpose except as specifically authorized in writing by Thermo GasTech.

COPYRIGHT STATEMENT

Information contained in this document is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another program or system without prior written authorization from Thermo GasTech., © 2001, Thermo GasTech.

TRADEMARK STATEMENT

Protected through use and/or registration in the United States and many foreign countries atrademarks and service marks of Thermo GasTech. The use of the ® symbol indicates registration in the United States only; registrations may not have been issued at present incountries. All other product names and logos are trademarks of their respective owners.

GASTECH® is a trademark of Thermo GasTech and is registered with the U.S. Patent andTrademark Office.

DISCLAIMER

Under no circumstances will Thermo GasTech be liable for any claims, losses, or damages resulting from or arising out of the repair or modification of the equipment by a party other than Thermo GasTech or its authorized service representatives, or by operation or use of the equipment other than in accordance with the printed instructions provided by Thermo GasTech or if the equipment has been improperly maintained or subject to neglect or accident. Any of the foregoing will void the warranty.

EXPORT STATEMENT

Export of the information and products in this manual from the U.S.A., or re-export from another country, may require written authorization from the U.S. Department of Commerce. Printed in the U.S.A.

REVISIONS TO MANUAL

All information contained in this manual is believed to be true and correct at the time of printing. However, as part of its continuing efforts to improve its products and their documentation, Thermo GasTech reserves the right to make changes at any time without notice. Any revised copies of this manual can be obtained by writing Thermo GasTech.

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THIS INSTRUMENT IS DESIGNED TO DETECT ONE OR MORE OFTHE FOLLOWING:

FLAMMABLE VAPORS, OXYGEN CONTENT, AND/OR TOXIC GAS AND TOGIVE WARNING BEFORE THEY REACH HARMFUL CONDITIONS. IN ORDERTO ENSURE THAT IT WILL WARN OF DANGEROUS CONCENTRATIONS, ITIS ESSENTIAL THAT THE INSTRUCTIONS IN THIS MANUAL, PARTICULARLYTHOSE CONCERNING START UP, OPERATION, CALIBRATION, ANDMAINTENANCE, BE READ, UNDERSTOOD, AND FOLLOWED.

NOTATION CONVENTIONS

Notices are used in this operator’s manual to alert you to hazardous conditions to person or instrument and to notify you of additional information. This operator’s manual uses the following notices.

WARNINGNotifies you of potential danger that can result in personal injury or death.

CAUTIONNotifies you of potential damage to equipment.

NOTENotifies you of additional or critical information.

WARNING

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Thermo GasTech maintains an instrument service facility at the factory as well as authorized service facilities around the world. Should your instrument require service, you may contact us toll free at 1-877-GASTECH (427-8324) for US only or 1-510-745-8700, or visit our website www.thermogastech.com for authorized service locations.

For warranty or non-warranty repairs, call us to complete a Return Material Authorization (RMA) form, obtain billing and shipping information and tell us the nature of the problem. For non-warranty repairs, you will need to provide a purchase order number. If you need to set a limit to the repairs costs, state a “Not to Exceed” figure. If you need a quotation before you can authorized the repair costs, so state, but understand this will incur additicosts and may delay processing of the repair.

You may send the unit, prepaid, to: Thermo GasTech, 8407 Central Ave., Newark, CA 94560-3431, Attn.: Service Department. Enclose the copy of the RMA (Return Material Authorization) that was previously faxed to yoPack the instrument and all its accessories (preferably in its original packand any special instructions.

Repairs are warranted for 90 days from the date of shipment. Sensors hindividual warranties.

NOTEThermo GasTech assumes no liability for work performed by unauthorized service facilities.

SERVICE POLICY

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Thermo GasTech (the “Company”) warrants that the Products will operate substantially in conformance with the Company’s published specificationswhen subjected to normal, proper, and intended usage by properly trainedpersonnel, for a period of one (1) year after shipment to Customer (the “Warranty Period”). The Company agrees during the Warranty Period, provided it is promptly notified in writing upon the discovery of any defect afurther provided that all costs of returning the defective Products to the Company are prepaid by Customer, to repair or replace, at the Company’soption, defective products so as to cause the same to operate in substantconformance with said specifications. Replacement parts may be new or refurbished, at the election of the Company. All replaced parts shall becomthe property of the Company.Lamps, pump diaphragms/valves, batteries, fuses, bulbs, and other expenitems are expressly excluded from the warranty.The Company’s sole liability with respect to equipment, materials, parts, osoftware furnished to the Company by third party suppliers shall be limitedthe assignment by the Company to Customer of any such third-party supplwarranty, to the extent the same is assignable. In no event shall the Comphave any obligation to make repairs, replacements, or corrections requiredwhole or in part, as the result of (i) normal wear and tear, (ii) accident, disaor event of force majeure, (iii) misuse, fault, or negligence of or by Custom(iv) use of the Products in a manner for which they were not designed, (v)causes external to the Products such as, but not limited to, power failure oelectrical power surges, or (vi) use of the Products in combination with equipment or software not supplied by the Company.ANY INSTALLATION, MAINTENANCE, REPAIR, SERVICE, RELOCATION, OR ALTERATION TO OR OF, OR OTHER TAMPERING WITH, THE PRODUCTS PERFORMED BY ANY PERSON OR ENTITY OTHER THAN THE COMPANY WITHOUT THE COMPANY’S PRIOR WRITTEN APPROVAL, OR ANY USE OF REPLACEMENT PARTS NOT SUPPLIED BY THE COMPANY, SHALL IMMEDIATELY VOID AND CANCEL ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS.THE OBLIGATION TO REPAIR OR REPLACE A DEFECTIVE PRODUCT SHALL BE THE SOLE REMEDY OF CUSTOMER IN THE EVENT OF A DEFECTIVE PRODUCT. EXCEPT AS EXPRESSLY PROVIDED IN THIS SECTION, THE COMPANY DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED, ORAL OR WRITTEN, WITH RESPECT TO THE PRODUCTS, INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THE COMPANY DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR-FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT.

WARRANTY STATEMENT

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TABLE OF CONTENTS

Chapter 1IntroductionDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Chapter 2Installation and Start UpInstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 3Normal Operation and AlarmsNormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Chapter 4CalibrationCalibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chapter 5MaintenanceRoutine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Interchangeability of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Appendix AParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Appendix BAccessoriesCard Cages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Appendix CTransmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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Safe T Net 2000 Operator’s Manual

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Chapter1

INTRODUCTION

Description

SafeT Net is a family of fixed-instrument, continuous-monitoring systems.

The Safe T Net 2000 is a two-channel, rack- or panel-mounted controller module that receives signals from remote gas transmitters, displays the gas concentrations, provides alarm, recorder, and relay outputs, uses 24 VDC power, and provides power to the remote transmitters, including sample-draw transmitters.

Figure 1-1 Front Panel

The Safe T Net 2000 is capable of detecting many gases. Appendix C, Transmitters, lists the transmitters you can order with your controller.

HIGH ALARM

LOW ALARM

FAULT

COMB

PPM

% VO L

% LEL

HIGH ALARM

LOW ALARM

FAULT

H2S

PPM

% VO L

% LEL

CALIBRATE

RESET

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Features

• Accepts one or two channels of standard 4 to 20 mA analog inputsignals from remote 2- or 3-wire transmitters for detecting combustible gas, toxic gas, or oxygen concentrations.

• Simultaneously displays the current gas reading for both channels

• Provides a 4 to 20 mA analog recorder output for each channel.

• Warns you of hazardous gas concentration conditions with audibleand visual indications at two alarm setpoints for each channel.

• Fault circuit provides visual, audible, and relay indications to warnyou of detector failure or other malfunctions.

• Provides a low and a high alarm relay for each channel.

• Is a slide-in module for a standard 4U rack assembly.

• Occupies one 8E width (1.60 inches).

Programmable Relay Operation

Each active channel has two relays: Low alarm and high alarm. A master relay activates if either channel is in a fail condition. You can program threlays for latching or self-resetting alarm logic, energizing or de-energizirelay activation (low and high alarm relays), activation on rising or fallingsignal levels, and time delay (0 to 30 seconds) to avoid false alarms dueradio frequency interference (RFI) or electromagnetic interference (EMI)

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Introduction

Specifications

Table 1-1 lists the specifications of the Safe T Net 2000. See Appendix C, Transmitters, for gas detection specifications.

Table 1-1 Safe T Net 2000 Specifications

Range Adjustable to 999. Decimal can be set in any position.

Inputs Two 24 VDC 4 to 20 mA analog signal inputs, source-type, two- or three-wire.

Analog recorder outputs

One 4 to 20 mA source for each channel, 1000 OHMS maximum at 24 VDC input.

Relay outputs Low alarm relay (Form C) and high alarm relay (Form A) for each channel, programmable for latching/non-latching, and energized/de-energized. Common fault (Form B), normally energized, programmable for latching/non-latching. Each relay rated at 10 AMP/125 VAC.

Voltage input 24 VDC nominal (18-30 VDC).

Current consumption

0.25 Amp maximum. Fuse: 3AG-1, 250 V/1 Amp.

Low alarms Independently adjustable from OFF to full scale.Audible and visual indication.Acknowledged using the RESET button.Programmable to activate on rising or falling level.

High alarms Independently adjustable from OFF to full scale.Audible and visual indication.Programmable to activate on rising or falling level.

Common fault alarm Programmable to activate at 3.7 mA, 3.2 mA, or 2.0 mA input signal. Can be disabled.

Calibration time out Programmable from 0 (no time out) to 99 minutes.

Alarm delay Programmable from 0 (no delay) to 99 seconds.

Operating temperature

-20° to +45°C (-5° to +115°F).

Operating humidity 0 to 95% RH non-condensing.

Module dimensions 1.60" (41 mm) (8E) W, 6.80” (173 mm) (4U) H, 9.45" (240 mm) D

Weight Approximately 1.3 lbs (0.6 Kg).

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Chapter2

INSTALLATION AND START UP

WARNINGPerform all installation procedures in a fresh air environment (known to be free of combustible and toxic gas and having normal oxygen content). The Safe T Net 2000 is not in operation as a gas monitoring system until the start up procedure is complete.

Installation

The packing slip indicates the serial number of your Safe T Net 2000. The serial number is also on a label on the side of the Safe T Net 2000. Please record the serial number on the front of this manual.

The Safe T Net 2000 controller is suitable for mounting in a rack assembly using card-guides to support the main circuit board and the two captive screws at the front of the controller to secure it in place.

The Safe T Net 2000 controller can be used with any standard 2- or 3-wire 4 to 20 mA analog transmitter. When changing transmitter types, follow the instructions for programming the Safe T Net 2000 in the Programming section of this chapter.

The installation should be in a safe area, preferably near an entrance door where the fire department or other emergency response team can see the indication if an alarm has caused the building to be evacuated.

The wiring diagram for the Safe T Net 2000 is shown in Figure 2-1.

WARNINGThe Safe T Net 2000 slides forward in its guides for access to the programming controls. Maintain a minimum 10cm (5 inch) service loop at the wiring connections.

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Figure 2-1 Wiring Diagram

SAFE

TNE

T 20

00

CIR

CU

IT B

OAR

D

PWR

IN 1

IN 2

OU

T 1

OU

T 2

LOW

1

LOW

2

HI 1

HI 2

FAU

LT27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

NC

CO

M NOC

OM NO

CO

M NO

CO

M NC NO

CO

M NC

+ - + - -

FB +SH

IELD

-

FB +R

ESET

GND

CO

M

24VD

C

REM

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GR

OUN

D S

CREW

O

N C

ARD

CAG

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R BA

CK

PLAT

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24V

DC

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UPP

LY

COM

+24V

DC

GN

D

CH

ANNE

L 1

LOW

ALA

RM

DEV

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COMMON

FEEDBACK

+24VDC

FEEDBACK

+24VDC

3 W

IRE

TRAN

SMIT

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PUT

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ISO

LATE

D F

ORM

B C

ONT

ACTS

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AMP

MAX

)

N/C

N/C

N/C

+ - + -

CHA

NNE

L 2

LOW

ALA

RM

DEV

ICE

CH

ANN

EL 1

H

IGH

ALAR

M D

EVIC

E

CH

ANN

EL 2

H

IGH

ALAR

M D

EVIC

E

CO

MM

ON

FAU

LT

ALAR

M D

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EXTE

RNA

L PO

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TAC

TS (1

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P M

AX)

ISO

LATE

D F

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A C

ON

TAC

TS (1

0 AM

P M

AX)

ISO

LATE

D FO

RM

C C

ON

TAC

TS (1

0 AM

P M

AX)

ISO

LATE

D FO

RM

C C

ON

TAC

TS (1

0 AM

P M

AX)

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Installation and Start Up

Terminal Strips

The terminal strip, at the rear of the module, is composed of three connectors of nine terminals each. The connectors are removable to facilitate installation and service operations and keyed to prevent them from being interchanged. The 27 screw-type terminals accept wire up to 12 gauge.

Figure 2-2 Terminal Strip

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

25

2627

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Table 2-1 Safe T Net 2000 Terminal StripTerminal Label

TerminalNumber

Description

NCCOM

T27T26

Normally closed 1

CommonCommon fault relay

NOCOM

T25T24

Normally open 2

CommonChannel 2 high alarm relay

NOCOM

T23T22

Normally open 2

CommonChannel 1 high alarm relay

NOCOMNC

T21T20T19

Normally openCommonNormally closed

Channel 2 low alarm relay

NOCOMNC

T18T17T16

Normally openCommonNormally closed

Channel 1 low alarm relay

+-

T15T14

4 to 20 mACommon

Channel 2 4 to 20 mA analog recorder output

+-

T13T12

4 to 20 mACommon

Channel 1 4 to 20 mA analog recorder output

-FB+

T11T10T9

CommonSignal+24 VDC

Channel 2 4 to 20 mA analog signal input

SHIELD T8 Shield

-FB+

T7T6T5

CommonSignal+24 VDC

Channel 1 4 to 20 mA analog signal input

RESET T4 Remote reset

GNDCOM24 VDC

T3T2T1

Ground (chassis)Common (circuit ground)+24 VDC

Power in

1. Fault relay factory setting is normally energized and de-energize in a fault condition such that contact closure occurs between C and NC in a fault condition.

2. Can be factory configured to be normally closed and open on alarm.

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Programming

The Safe T Net 2000 can be programmed for any gas detection application supported by the 4 to 20 mA transmitters listed in Appendix C, Transmitters.

Using the programming switches and buttons along the bottom of the circuit board, the following parameters can be set for each channel:

• Channel settings:

- Range

- Decimal place

- Indicated gas units (ppm, %LEL, %VOL)

- Low and high alarm levels

• Gas alarm relays:

- Latching or self-resetting

- Normally energized or deenergized

- Activated on rising or falling level

• Fault alarm:

- Activation level

- Relay latching or self-resetting

• Alarm buzzer enabled or disabled

• Calibration time out

• Alarm delay

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Standard Settings

The standard ranges for various transmitter types are listed in Appendix C, Transmitters.

CAUTIONThe standard ranges provide optimum performance of each transmitter type. Contact Gas Tech before using a non-standard range.

Table 2-2 Standard Factory SettingsLow Alarm Form C

Normally de-energizedLatching (O2 is self-resetting)Activated on a rising concentration (except oxygen)

High Alarm Form ANormally de-energizedLatching (O2 is self-resetting)Activated on a rising concentration

Fault Alarm Form BNormally energizedSelf-resettingSetpoint: 3.2 mA analog input signal (5% downscale drift)

Alarm Delay OFF

Calibration time out

15 minutes

Buzzer Enabled

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Changing the Settings

The settings are made using the three DIP switches (U1, U9, U10) and three buttons, STEP, �▲ (UP), and ▼ (DOWN)) located at the bottom edge of the controller module circuit board.

On the DIP switches, ON is the switch position up away from the edge of the board and OFF is down toward the edge of the board.

NOTEWhile the Safe T Net 2000 is in any of its set-up modes, the 4 to 20 mA analog recorder outputs fall to 1.5 mA.

Figure 2-3 Controller Board Switches and Programming Buttons

Control buttons DIP switches

UP

DOWNSTEP

DC fuse

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DIP SWITCH U1 (COMMON SETTINGS)

U1 is the DIP switch closest to the front of the module (adjacent to the control buttons). The switches of U1 control the functions common to both channels.

Table 2-3 DIP switch U1 - Setting Common to Both Channels

Switch Position Function

1 (left) ON Enable set-up mode 1 for both channels. See Set-Up Mode 1, in this chapter.

OFF Normal operation.

2 ON Enable set-up mode 2 for both channels. See Set-Up Mode 2, in this chapter.


3 ON Enable set-up mode 3 for both channels. See Set-Up Mode 3, in this chapter.


4 ON Select channel 1 (set-up mode 3).

OFF Select channel 2 (set-up mode 3).

5 ON Fault relay latched.

OFF Fault relay unlatched (self-resetting).

6 Switches 6 and 7 are used together to set the fault alarm level. See Fault Alarm Level, in this chapter.

7

8 (right) ON Enable alarm buzzer.

OFF Disable alarm buzzer.

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DIP SWITCH U9 (CHANNEL 1 RELAYS)

U9 is the middle of the three DIP switches. The switches of U9 control the operation of the channel 1 low and high relays. Switch 7 turns the channel on and off.

Table 2-4 DIP switch U9 - Channel 1 Settings


1 (left) ON Channel 1 low relay latched

OFF Channel 1 low relay unlatched (self-resetting)

2 ON Channel 1 low relay normally de-energized

OFF Channel 1 low relay normally energized

3 ON Channel 1 low relay activated on falling level

OFF Channel 1 low relay activated on rising level

4 ON Channel 1 high relay latched

OFF Channel 1 high relay unlatched (self-resetting)

5 ON Channel 1 high relay normally de-energized

OFF Channel 1 high relay normally energized

6 ON Channel 1 high relay activated on falling level

OFF Channel 1 high relay activated on rising level

7 ON Channel 1 OFF 1

OFF Channel 1 ON

8 (right) Not used Not used

1. When channel 1 is off, the display shows OFF, the status LEDs (HIGH ALARM, LOW ALARM, and FAULT) are off, the relays are held in the inactive state, the recorder output is 0 mA, and it cannot be placed in calibration mode.

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DIP SWITCH U10 (CHANNEL 2 RELAYS)

U10 is the bottom DIP switch furthest from the front of the module. The switches of U10 control the operation of the channel 2 low and high relays. Switch 7 turns the channel on and off.

Table 2-5 DIP switch U10 - Channel 2 Settings


1 (left) ON Channel 2 low relay latched

OFF Channel 2 low relay unlatched (self-resetting)

2 ON Channel 2 low relay normally de-energized

OFF Channel 2 low relay normally energized

3 ON Channel 2 low relay activated on falling level

OFF Channel 2 low relay activated on rising level

4 ON Channel 2 high relay latched

OFF Channel 2 high relay unlatched (self-resetting)

5 ON Channel 2 high relay normally de-energized

OFF Channel 2 high relay normally energized

6 ON Channel 2 high relay activated on falling level

OFF Channel 2 high relay activated on rising level

7 ON Channel 2 OFF 1

OFF Channel 2 ON

8 (right) Not used Not used

1. When channel 2 is off, the display shows OFF, the status LEDs (HIGH ALARM, LOW ALARM, and FAULT) are off, the relays are held in the inactive state, and it cannot be placed in calibration mode.

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SET-UP MODE 1 (RANGES AND ALARM SETPOINTS)

Set-up mode 1 is used to set the channel 1 and channel 2 range, low alarm, and high alarm levels.

CAUTIONThe standard ranges are listed in Appendix C, Transmitters of the Safe T Net 2000 Operator’s Manual provide optimum performance of each transmitter type. Contact Gas Tech before using a non-standard range.

You can exit set-up mode 1 by setting switch 1 to OFF at any point in the procedure without losing your settings. In addition, range and alarm settings are retained by the Safe T Net 2000 even when power is removed. While the Safe T Net 2000 is in set-up mode 1, the 4 to 20 mA analog recorder outputs go to 1.5 mA.

1. Initiate set-up mode 1 by placing U1 switch 1 in the ON position (away from the edge of the board).

2. The channel 1 display, LOW ALARM LED, and HIGH ALARM LED ▼ (DOWN) buttons.

3. Press the STEP button to accept the current value and go to the next setting.

4. The channel 1 DISPLAY and LOW ALARM LED flash. Channel 1 low alarm level can now be set using the ▲ (UP) and ▼ (DOWN) buttons.


6. The channel 1 DISPLAY and HIGH ALARM LED flash. Channel 1 high alarm level can now be set using the ▲ (UP) and ▼ (DOWN) buttons.


8. The channel 2 display, LOW ALARM LED, and HIGH ALARM LED flash. Channel 2 range can now be set using the ▲ (UP) and ▼ (DOWN) buttons.


10.The channel 2 DISPLAY and LOW Alarm LED flash. Channel 2 low alarm level can now be set using the ▲ (UP) and ▼ (DOWN) buttons.

11.Press the STEP button to accept the current value and go to the next setting.

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12.The channel 2 DISPLAY and HIGH ALARM LED flash. Channel 2 high alarm level can now be set using the ▲ (UP) and ▼ (DOWN) buttons.

13.Return U1 switch 1 to OFF to resume normal operation.

SET-UP MODE 2 (GAS UNITS AND DECIMAL PLACE)

Set-up mode 2 is used to set the individual parameters for channel 1 and channel 2 decimal place, and indicated gas units (ppm, %LEL, %VOL).


2. The channel 1 display flashes, showing full scale range. The channel 1 decimal place can now be set using the ▲ (UP) and ▼ (DOWN) buttons.


4. The channel 1 display shows only the decimal point chosen; the selected gas units flash. The channel 1 gas units (ppm, %LEL, %VOL) can now be set using the ▲ (UP)and ▼ (DOWN) buttons.


6. The channel 2 display flashes, showing full scale range. The channel 2 decimal place can now be set using the ▲ (UP) and ▼ (DOWN) buttons.


8. The channel 2 display shows only the decimal point chosen; the selected gas units flash. The channel 2 gas units (ppm, %LEL, %VOL) can now be set using the ▲ (UP)and ▼ (DOWN) buttons.

9. Return U1 switch 2 to OFF to resume normal operation.

While the Safe T Net 2000 is in set-up mode 2, the 4 to 20 mA analog recorder outputs go to 1.5 mA.

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SET-UP MODE 3

Set-up mode 3 is a factory-only calibration that calibrates the signal input circuitry to recognize the 0 mA and 20 mA analog inputs.

CAUTIONSet-up Mode 3 is a factory adjustment and is not generally meant to be made by the user.


2. Select channel 1 (switch 4 = ON) or channel 2 (switch 4 = OFF).

3. The selected display and status LEDs flash.

4. With no signal (0 mA) applied to the channel input terminals, press the ▼ (DOWN) button.

5. Apply 20.0 mA to the channel input terminals and press the ▲ (UP) button.

6. Return U1 switch 3 to OFF to resume normal operation.

While the Safe T Net 2000 is in set-up mode 3, both 4 to 20 mA analog output signals go to 1.5 mA.

FAULT ALARM SETPOINT

The Safe T Net 2000 generates a fault alarm when either of the channel input signals drops below the 4.0 mA analog input signal zero point to the programmed fault alarm setpoint (refer to Table 2-6). (This feature can be disabled.) The setting applies to both channel inputs. When the fault alarm is triggered, the FAULT LED lights, the buzzer sounds, and the fault relay de-energizes and the contacts close.

Set the fault alarm setpoint by setting U1 switches 6 and 7 as follows:

Table 2-6 Fault Alarm Trigger LevelsFault alarm analog input

signal trigger level U1 Switch 6 U1 Switch 7

2.0 mA OFF ON

3.2 mA (factory setting) ON OFF

3.7 mA ON ON

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CALIBRATION TIME OUT

If calibration mode is not turned off manually, the Safe T Net 2000 automatically returns to normal operation from calibration mode after a preprogrammed time out from 0 (no time out) to 99 minutes

NOTEThe standard calibration time out setting is 15 minutes.

Program the calibration time out as follows:

1. While in normal operation, press the STEP and ▼ (DOWN) buttons simultaneously to initiate the calibration time out set-up mode.

2. The channel 1 LOW and HIGH ALARM LEDs are lit, the display shows the current calibration time out setting in minutes. The calibration time out can now be set using the ▲ (UP)and ▼ (DOWN) buttons.

3. Press the STEP button to accept the current value and resume normal operation.

CAUTIONThe visual and audible alarm indications and relays are inactive during calibration time out and will not indicate any hazardous gas concentrations that may occur while calibration mode is enabled.

ALARM DELAY

The Safe T Net 2000 can be programmed to delay the operation of alarm relays and status LEDs for a pre-determined time after alarm levels have been exceeded. This feature allows you to prevent nuisance alarms caused by transient radio frequency interference (RFI). The alarm delay can be set from 0 (no delay) to 99 seconds.

NOTEThe standard alarm delay factory setting is zero seconds (no delay).

Set the alarm delay as follows:

1. While in normal operation, press the ▲ (UP) and ▼ (DOWN) buttons simultaneously to initiate the alarm delay set-up mode.

2. The channel 1 display shows the current alarm delay in seconds. The alarm delay can now be set using the ▲ (UP) and ▼ (DOWN) buttons.

3. Press the STEP button to accept the current value and resume normal operation.

18 71-0019 - REV G


Start Up

Complete the following procedures to place the Safe T Net 2000 in normal operation.

Preparing for Start Up

Perform the following steps when preparing for start up:

1. Complete the mounting and wiring procedures described earlier in this chapter.

2. Complete all installation procedures described in the Transmitters manual.

3. Verify that all wiring connections are correct and secure.

Introducing Power

Turn on the incoming power at the power source.

NOTEThe low alarm, high alarm, and fault circuits are not active for 1 minute after power is applied to the Safe T Net 2000. This time delay minimizes false alarms during transmitter warm-up.

Verifying Indicator Lights

1. Verify the displays are on.

2. If no light comes on during the startup sequence, the Safe T Net 2000 is not receiving power. Check the wiring connection, the power source, and the fuses. See Chapter 5, Maintenance, for detailed troubleshooting instructions.

3. Table 2-7 shows the conditions indicated by the status indicator lights during start up, and the suggested response for each condition.

71-0019 - REV G 19


Start up is complete and the Safe T Net 2000 is operating in normal mode.

Table 2-7 Start Up Indications

Indicators Probable Status Recommended Response

Lights on Receiving power. None.

FAULT Below-zero reading.

Allow detector to warm-up. Zero the transmitter output.Replace detector if the below-zero reading continues.See the Troubleshooting section of Chapter 5, Maintenance.

Detector, transmitter, or circuitry is broken, incomplete, or incorrect.

Verify transmitter and detector wiring is correct and secure.See the Troubleshooting section of the Transmitters manual.

ALARM Above-zero reading

Zero detector after warm up.

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Chapter3

NORMAL OPERATION AND ALARMS

d

h

s

e

in

Normal Operation

Normal operation is any time the start up procedure is complete, no calibration or set-up procedures are in progress, and no alarm, or fault condition exists. During normal operation, the Safe T Net 2000 behaves as follows:

• The screens displays the current gas concentrations (channel 1 on the top screen, channel 2 on the bottom screen).

• The 4 to 20 mA analog recorder outputs at the terminal strip (T12 and T13 for channel 1, T14 and T15 for channel 2) corresponto the displayed gas readings.

• The HIGH ALARM, LOW ALARM, and FAULT lights and relays for both channels are deactivated.

Alarms

This section describes the Safe T Net 2000 indications for low alarm, higalarm, and fault conditions, including the standard relay action.

The Safe T Net 2000 activates visual, audible, and relay alarm indicationwhen any of the programmed alarm setpoints are passed.

WARNINGThe calibration mode feature of the Safe T Net 2000 allows you to disable the alarm LED’s, buzzer, and relays during calibration procedures and response tests. When calibration mode is activated, the LED’s, buzzer, and relays will not operate as described in this section.

• Table 3-1 shows the Safe T Net 2000’s alarm indications. The tablshows Gas Tech standard settings for alarm action and relay activation.

• The Standard Range and Alarm Setpoint table in each transmittermanual lists the standard low and high alarm setpoints for the transmitters supplied with your Safe T Net 2000.

• You can adjust the relay action using the set-up modes describedChapter 2, Installation and Start Up.

71-0019 - REV G 21


ess

ess

t the ence. s.

set

ing elf-des

Low Alarm

When the displayed gas concentration passes the programmed low alarm setpoint:

• The LOW ALARM LED lights.

• The buzzer pulses

• The low alarm relay activates.

If the alarm is set to trigger on a rising level, the indications continue, unlreset, until the concentration decreases below the setpoint.

If the alarm is set to trigger on a falling level, the indications continue, unlreset, until the concentration increases above the setpoint.

RESET: Press the RESET button on the front face of the controller to resealarm. This causes the low alarm relay to deactivate and the buzzer to silThe LOW ALARM LED continues to flash until the alarm condition passe

The operation of the RESET button can be duplicated using a remote reswitch. This switch must be a momentary contact N.O. switch connectedacross the remote reset and common terminals of the Safe T Net 2000.

Thermo GasTech sets the low alarm setpoints (except oxygen) for latchaction. Oxygen channels low alarms are factory set programmed to be sresetting. You can select latch or self-reset alarm action in the set-up modescribed in Chapter 2, Installation and Start Up.

Table 3-1 Audible and Visual Alarm Indications

Condition Cause Visual Indication

Buzzer, if activated

Normal Start up complete; no gas alarm or fault conditions.

Display(s) on None

Low Alarm Increasing (or decreasing O2) reading at alarm setpoint.

LOW ALARMlight on

Pulsing

High Alarm Increasing reading at high alarm setpoint.

HIGH ALARMlight on

Pulsing

Fault Incomplete, broken, or incorrect detector, amplifier, or circuitry; Below zero reading

FAULT LED on; Display flashes alternating with FLt.

Pulsing

22 71-0019 - REV G

Normal Operation and Alarms

nue , the

is

tion. ou

d in

If the low alarm is latching: If the low alarm has been configured to be latching, and the alarm has not been acknowledged, the buzzer, LED, and relay remain active after the alarm condition has passed. These alarm indications must then be cleared by pressing the RESET button on the front face of the controller, or by initiating a remote reset.

1. Follow the established procedure for a low level combustible or toxic gas condition (or a decreasing oxygen condition). If a procedure is not in place, establish one that is appropriate for your application.

2. When the reading returns to normal, press the RESET button to silence the buzzer, turn off the LOW ALARM light, deactivate the alarm relay, and reset the alarm circuit.

If the low alarm is self-resetting:

1. Follow the established procedure for a low level combustible or toxic gas condition or a decreasing oxygen condition. If a procedure is not in place, establish one that is appropriate for your application.

2. After the reading returns to normal, the Safe T Net 2000 automatically silences the buzzer, turns off the LOW ALARM light, deactivates the applicable alarm relay, and resets the alarm circuit.

High Alarm

When the display level passes the programmed high alarm setpoint:

• The red HIGH ALARM LED lights.

• The buzzer continues to pulse.

• The high alarm relay activates.

If the alarm is set to trigger on a rising concentration, the indications contiuntil the reading decreases below the setpoint and, if the alarm is latchingRESET button is pressed.

If the alarm is set to trigger on a falling concentration, the indications continue until the reading increases above the setpoint and, if the alarmlatching, the RESET button is pressed.

NOTEUnlike the low alarm, you cannot reset the high alarm while the reading is at or above the high alarm setpoint.

Thermo GasTech sets the high alarms (except oxygen) for latch alarm acOxygen channels are set for self-reset alarm action for the high alarm. Ycan select latch or self-reset alarm action in the Set-up modes describeChapter 2, Installation and Start Up.

71-0019 - REV G 23


If the high alarm is latching: If the high alarm has been configured to be latching, the buzzer, LED, and relay remain active after the alarm condition has passed. The high alarm indications can only be cleared by pressing the RESET button, or by initiating a remote reset.

1. Follow the established procedure for a high level combustible, toxic, or oxygen gas condition. If a procedure is not in place, establish one that is appropriate for your application.

NOTEYou cannot silence the buzzer while the Safe T Net 2000 is in a high alarm condition. The reading must decrease below the alarm setpoint before the buzzer will silence.

2. After the reading decreases below the high alarm setpoint, press the RESET button to turn off the HIGH ALARM light, deactivate the alarm relay, and reset the alarm circuit.

If the high alarm is self-resetting:

1. Follow the established procedure for a high level combustible, toxic, or oxygen gas condition. If a procedure is not in place, establish one that is appropriate for your application.

NOTEYou cannot silence the buzzer while the Safe T Net 2000 is in a high alarm condition. The reading must decrease below the high alarm setpoint before you can silence the buzzer.

2. After the reading decreases below the high alarm setpoint, the Safe T Net 2000 automatically turns off the HIGH ALARM light, de-energizes the high alarm relay, and resets the high alarm circuit.

3. When the reading decreases below the high alarm setpoint, the Safe T Net 2000 may still be in low alarm condition. Respond to the low alarm condition as appropriate.

24 71-0019 - REV G

Normal Operation and Alarms

t

. See

Fault Condition

The fault alarm is activated when the 4 to 20 mA analog input from a transmitter falls below the 4 mA zero point to the programmed fault alarm setpoint. This can be caused by such factors as a drifting sensor input or a broken wire connection. When a fault alarm occurs, the indications are as follows:

• The FAULT LED lights.

• The display alternates between the gas reading and FLt.

• The buzzer and fault relay activate.

The fault relay is programmable to be latching or self-resetting. The faulrelay is normally energized and de-energizes in fault condition.

The fault alarm setpoint can be changed using the programming controlsthe Fault Alarm Level section of Chapter 2, Installation and Start Up.

If a fault condition occurs:

1. Make sure the wiring connections at the Safe T Net 2000 terminalstrip are correct and secure.

2. See the Troubleshooting section in Chapter 5, Maintenance.

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26 71-0019 - REV G

Chapter4

CALIBRATION

No calibration of the Safe T Net 2000 controller is required. Refer to the transmitter manual for instructions on setting the analog output signal from the transmitter.

Calibration Mode

To avoid unwanted alarms during the calibration procedure, either or both of the channels of the Safe T Net 2000 can be placed in calibration mode. In calibration mode, the alarm LEDs and relays of the channel remain inactive, the buzzer remains off, and the recorder output goes to 1.5 mA.

Activate calibration mode by pressing the CALIBRATE button through the opening marked CALIBRATE on the front face of the controller. If you do not turn off calibration manually, it will turn off automatically when the calibration time-out has elapsed (standard factory setting is 15 minutes).

CAUTIONThe visual and audible alarm indications and relays are inactive during calibration time out and will not indicate any hazardous gas concentrations that may occur while calibration mode is enabled.

Calibration mode has four settings (see to Table 4-1).

Table 4-1 Calibration Mode Setting

CALIBRATE button

Channel 1Status

Channel 2 Status

Press 1 time Calibration mode Normal operation

Press 2nd time Calibration mode Calibration mode

Press 3rd time Normal operation Calibration mode

Press 4th time Normal operation Normal operation

71-0019 - REV G 27


ith

lls

out

ls

s

m

the

ith

lls

out

els

1. Pressing the CALIBRATE button the first time puts channel 1 only into calibration mode:

• The display for channel 1 flashes, alternating the gas reading wCAL.

• Channel 1 LOW, HIGH and FAULT LEDs flash.

• The channel 1 relays remain inactive and the recorder output fato 1.5 mA.

• Channel 2 remains in the normal monitoring mode.

• The display for channel 1 can now exceed the alarm levels withactivating the channel 1 alarm relays.

2. Pressing the CALIBRATE button a second time puts both channeinto calibration mode:

• The displays for both channels flash, alternating the gas readingwith CAL.

• The LOW, HIGH and FAULT LEDs for both channels flash.

• The relays for both channels remain inactive and both recorder outputs fall to 1.5 mA.

• The display for either or both channels can now exceed the alarlevels without activating the alarm relays.

3. Pressing the CALIBRATE button a third time returns channel 1 to normal operation and puts channel 2 into calibration mode.

• The display for channel 2 flashes, alternating the gas reading wCAL.

• The channel 2 LOW, HIGH and FAULT LEDs flash.

• The channel 2 relays remain inactive and the recorder output fato 1.5 mA.

• Channel 1 remains in the normal monitoring mode.

• The display for channel 2 can now exceed the alarm levels withactivating the channel 2 alarm relays.

4. Pressing the CALIBRATE button a fourth time returns both channto normal operation.

28 71-0019 - REV G

Chapter5

MAINTENANCE

WARNINGPerform all maintenance procedures described in this chapter in a non-hazardous environment.

Routine Maintenance

Routine maintenance of the Safe T Net 2000 consists only of periodic checks to ensure that the system remains on zero (20.9% for O2) and is responsive to gas. The transmitters used with the Safe T Net 2000 must be calibrated at regular intervals following the procedures described in the tansmitter manual.

Interchangeability of Components

The Safe T Net 2000 controller can be used with any standard 2- or 3-wire 4 to 20 mA analog transmitter. When changing transmitter types, it may be necessary to change the range, decimal point, and alarm setpoints for the affected channel. Follow the instructions for programming the Safe T Net 2000 in Chapter 2, Installation and Start Up.

Troubleshooting

This troubleshooting manual describes symptoms, probable causes, and recommended actions for problems you may encounter with the Safe T Net 2000 (refer to Table 5-1). This guide covers the Safe T Net 2000 only, see the Troubleshooting section in the Transmitters manual, for problems you may encounter with the transmitters.

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Tab

P nded Action

N at power is on.

rrect connections at the power sources.at the wiring connections at the terminal strip are and correct.e continuity of the fuse, and replace if necessary.3AG-1, 250 Volts/1 Amp.) failure continues, contact Thermo GasTech for struction.

FrS

the alarm delay setting using the setup procedures d in Chapter 2, Installation and Start Up.

re that the transmitter wiring to the Safe T Net 2000 ly shielded. See the Installation section of the ters manual.difficulties continue, contact Thermo GasTech for struction.

NA

calibrate mode as described in Chapter 4, on.

he buzzer. See the DIP switch U1 section of 2, Installation and Start Up.zer continues to fail, contact Thermo GasTech for struction.

le 5-1 Safe T Net 2000 Troubleshooting

roblem Symptoms Probable Cause Recomme

o Power No readings or messages on the display screens.

• Incomplete or incorrect power circuit.

1. Verify th

2. Verify co3. Verify th

complete4. Check th

(Fuse is 5. If power

further in

equent or uspect Alarms

Frequent or suspect alarms. No change in zero reading.

• False readings due to RFI or EMI.

1. Increasedescribe

2. Make suis properTransmit

3. If alarm further in

o Audible larm

Buzzer does not sound appropriate audible alarm.Audible alarm sounds weak or broken.

• Calibrate mode is on.• Buzzer is disabled.• Buzzer is

malfunctioning.

1. Turn off Calibrati

2. Enable tChapter

3. If the buzfurther in

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31

Maintenance

Wh ts go to 1.5 mA.

DD

hermo GasTech for further instruction.

InR

etup mode 3 by placing U1 switch 3 in the ON (away from the edge of the board).

annel 1 (switch 4 = ON) or channel 2 (switch 4 =

cted display and status LEDs flash.signal (0 mA) applied to the channel input , press the (DOWN) button..0 mA to the channel input terminals and press the ton.1 switch 3 to OFF to resume normal operation.

Tab

P nded Action

ile the Safe T Net 2000 is in setup mode 3, the 4 to 20 mA analog recorder outpu

istorted isplay

Letters or numbers on the display screens are missing or distorted.

• Display screen malfunction.

1. Contact T

correct Signal eading

Feedback signal does not correspond with the reading at the display.

• Inadvertently pushed buttons.

1. Initiate sposition

2. Select chOFF).

3. The sele4. With no

terminals5. Apply 20

(UP) but6. Return U

le 5-1 Safe T Net 2000 Troubleshooting (Continued)

roblem Symptoms Probable Cause Recomme


Replacing Components

Replacing the Fuse

The fuse is the only replaceable component on the Safe T Net 2000 (refer to Figure 5-1).

Figure 5-1 Safe T Net 2000 Fuse

The fuse, located at the bottom of the main circuit board near the rear, protects the power circuit to the Safe T Net 2000 electronics and to the transmitters. To replace the fuse:

1. Disconnect power to the Safe T Net 2000 and unplug the three socketed connectors from the terminal strip.

2. Loosen the two screw fasteners on the front of the Safe T Net 2000 and pull the controller from the rack.

3. Locate the fuse on the controller circuit board and remove it from its spring clips using a screwdriver.

4. Replace the fuse with the same type (see Parts List, Appendix A).

5. Reinstall the Safe T Net 2000 into the rack.

6. Plug the three connectors back into the terminal strip. The connectors are keyed to preserve the order: number 1 at the bottom, number 27 at the top. Reconnect power to the Safe T Net 2000.

Fuse

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AppendixA

PARTS LIST

See Appendix C for transmitter part numbers.

Table A-1 Safe T Net 2000 Parts List

Part No. Description

21-4054 Card cage, full rack (19-inch, 10 slots)

21-4055 Card cage, half rack (4 slots)

22-0077 Blank panel, 4E (full rack)

22-0078 Blank panel, 8E (full rack)

22-0079 Blank panel, 10E (half rack)

22-0098 Panel mount trim plate (half rack)

22-0099 Panel mount trim plate (full rack)

23-0241 Replacement card guide

29-0019 Gas type label, front panel (set includes one label for each gas type)

43-4140 Fuse, 250 Volts/1 Amp (3AG-1)

49-0072 Power supply, 24 VDC 150W out, 100 to 230 VAC in, for 9 controllers with 18 transmitters (full rack)

49-0079 Power supply, 24 VDC 75W out, 100 to 230 VAC in, for 4 controllers with 8 transmitters (half rack)

71-0019 Operator’s Manual, Safe T Net 2000

73-0001 Safe T Net 2000 two-channel controller

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AppendixB

ACCESSORIES

Table B-1 lists the standard and optional accessories for the Safe T Net 2000. See Appendix A, Parts List, for part numbers.

Table B-1 Standard and Optional Accessories

Accessory Description

Safe T Net 2000Operator’s Manual 1

Includes detailed installation, operation, maintenance, and calibration procedures for the Safe T Net 2000.

Card cages Mounting structure for the Safe T Net 2000 modules and power supply.

Power supplies Supply 24 VDC to the Safe T Net 2000 module, transmitters, and sample draw adapters.

Panel mounting trim plates Cover the edges of the cut outs for panel mounting installations.

1. Standard accessory

71-0019 - REV G 35


Card Cages

Figures B-1 through B-4 provide mounting and panel cutout dimensions for the full rack and the half-rack card cages..

Figure B-1 Safe T Net 2000 Full Rack Mounting Dimensions

Figure B-2 Safe T Net 2000 Half Rack Mounting Dimensions

NOTE: THE FULL RACK CAN ACCOMODATE UP TO 10 SAFE-T-NET CONTROLLERS. (20 POINTS OF DETECTION) OR9 SAFE-T-NET 2000 CONTROLLERS (18 POINTS OF DETECTION) WHEN A POWER SUPPLY IS INSTALLED.

483 mm (19.00 INCH)437 mm

(17.20 INCH)

285 mm (11.3 INCH)

180 mm (7 .09 INCH)

102 mm (4.00 INCH)

14 mm (0.55 INCH)

8 mm (0.315 INCH) 4 PLACES

THE HALF RACK CAN ACCOMODATE UP TO 4 SAFE-T-NET CONTROLLERS.

NOTE:(8 POINTS OF DETECTION) WITH OR WITHOUT A POWER SUPPLY.

224 mm (8.82 INCH)

285 mm (11.3 INCH)

180 mm (7 .09 INCH)

102 mm (4.00 INCH)

14 mm (0.55 INCH)

252 mm (9.91 INCH)

269 mm (10.60 INCH)

36 71-0019 - REV G

Appendix B

k

ge

, it les is

er

in er

ews

trip oles

ng

ck),

W o

the

Power Supplies

Twenty-four VDC power must be supplied to each Safe T Net 2000 controller module. The controller module, in turn, supplies 24 VDC power to the transmitters and sample draw adapters connected to it.

Two power supplies are available from Thermo GasTech for the Safe T Net 2000:

• 24 VDC 150W out, 100 to 230 VAC in,for 9 controllers with 18 transmitters, used with the full 19-inch raccard cage

• 24 VDC 75W out, 100 to 230 VAC in, for 4 controllers with 8 transmitters, used with the half-rack card ca

See Appendix A, Parts List, for part numbers.

Installing the Power Supply

When a 150W power supply is installed in the full 19-inch rack card cageoccupies the space of one controller module. Only nine controller moducan be installed in the full 19-inch rack card cage when a power supply installed.

The half-rack card cage will accommodate four Safe T Net 2000 controllmodules with or without a 75W power supply installed.

The power supply occupies the rightmost position looking from the fronteither the full 19-inch rack card cage or the half-rack card cage. The powsupply is mounted to the right wall of the card cage by means of four scr(full rack) or two screws (half rack).

To install the power supply:

1. Position the power supply inside the card cage with the terminal stoward the rear of the card cage and the panel with the mounting hagainst the right wall of the card cage.

2. Align the mounting holes in the power supply with the correspondimounting holes in the wall of the card cage.

3. Fasten the power supply to the card cage using four screws (full raor two screws (half rack).

Figure B-3 shows how to connect the incoming AC power leads to a 150power supply and the 24 VDC power leads from a 150W power supply tthe Safe T Net 2000 controller modules.

Figure B-4 shows how to connect the incoming AC power leads to a 75Wpower supply and the 24 VDC power leads from a 75W power supply toSafe T Net 2000 controller modules.

71-0019 - REV G 37


Figure B-3 Connecting the 150 WATT Power Supply

Figure B-4 Connecting the 75 WATT Power Supply

38 71-0019 - REV G

AppendixC

TRANSMITTERS

al.

raw d e

Each transmitter includes an manual describing the 4 to 20 mA analog gas transmitters you ordered with your Safe T Net 2000 gas monitoring controller. A transmitter comes with the following:

• The transmitter assembly, including:

- Amplifier

- Housing

- Detector

• Transmitter Operator’s Manual

The inserts for the transmitters you originally ordered with your Safe T Net 2000 are included with your Safe T Net 2000 Operator's Manu

4 to 20 mA analog gas transmitters are available for diffusion or sample-dapplications for most gases. Diffusion transmitters have the 67- prefix ansample-draw transmitters have the 68- prefix. Tables C-1 thru C4 lists thtransmitters offered for the Safe T Net 2000.

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TGas Transmitter Detection Range

Diffusion typeSample draw

0 to 100 ppm


0 to 1 ppm


0 to 500 ppm


0 to 10 ppm


0 to 2 ppm


0 to 100% LEL


0 to 1 ppm


0 to 10 ppm


0 to 30 ppm

able C-1 Standard Transmitters for Safe T Net ControllersGas Type Part Number Manual Insert P/N

Ammonia (NH3) 67-0027-0968-0020-09

71-009071-0114

Arsine (AsH3) 67-0027-1368-0020-13

71-009071-0114

Carbon monoxide (CO) 67-0027-0168-0020-01

71-009071-0114

Chlorine (Cl2) 67-0027-0468-0020-04

71-009071-0114

Chlorine dioxide (ClO2) 67-0027-1668-0020-16

71-009071-0114

Combustible gases 65-500168-0020-19

71-0024-0171-0114

Diborane (B2H6) 67-0027-1868-0020-18

71-009071-0114

Fluorine (F2) 67-0027-0768-0020-07

71-009071-0114

Hydrogen chloride (HCl) 67-0027-0568-0020-05

71-009071-0114

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Appendix C


0 to 50 ppm


0 to 10 ppm


0 to 100 ppm


0 to 100 ppm


0 to 20 ppm


0 to 30% VOL


0 to 1 ppm


0 to 1 ppm


0 to 20 ppm


0 to 20 ppm

T ued)Gas Transmitter Detection Range

Hydrogen cyanide (HCN) 67-0027-0868-0020-08

71-009071-0114

Hydrogen fluoride (HF) 67-0027-0668-0020-06

71-009071-0114

Hydrogen sulfide (H2S) 67-0027-0268-0020-02

71-009071-0114

Nitric oxide (NO) 67-0027-1468-0020-14

71-009071-0114

Nitrogen dioxide (NO2) 67-0027-1568-0020-15

71-009071-0114

Oxygen (O2) 67-0027-0368-0020-03

71-009071-0114

Ozone (O3) 67-0027-1268-0020-12

71-009071-0114

Phosphine (PH3) 67-0027-1068-0020-10

71-009071-0114

Silane (SiH4) 67-0027-1168-0020-11

71-009071-0114

Sulfur dioxide (SO2) 67-0027-1768-0020-17

71-009071-0114

able C-1 Standard Transmitters for Safe T Net Controllers (ContinGas Type Part Number Manual Insert P/N

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Diffusion type 0 to 100 ppm





Diffusion type 0-100% LEL









Diffusion type 0 to 30% VOL





able C-2 FX-SMT Transmitters for Safe T Net Controllers Gas Type Part Number Manual Insert P/N

Ammonia (NH3) 67-0024-09 71-0085

Arsine (AsH3) 67-0024-13 71-0085

Carbon monoxide (CO) 67-0024-01 71-0085

Chlorine (Cl2) 67-0024-04 71-0085

Chlorine dioxide (ClO2) 67-0024-16 71-0085

Combustible (LEL) 67-0021-01 71-0085

Diborane (B2H6) 67-0024-18 71-0085

Fluorine (F2) 67-0024-07 71-0085

Hydrogen chloride (HCl) 67-0024-05 71-0085

Hydrogen cyanide (HCN) 67-0024-08 71-0085

Hydrogen fluoride (HF) 67-0024-06 71-0085

Hydrogen sulfide (H2S) 67-0024-02 71-0085

Nitric oxide (NO) 67-0024-14 71-0085

Nitrogen dioxide (NO2) 67-0024-15 71-0085

Oxygen (O2) 67-0024-03 71-0085

Ozone (O3) 67-0024-12 71-0085

Phosphine (PH3) 67-0024-10 71-0085

Silane (SiH4) 67-0024-11 71-0085

Sulfur dioxide (SO2) 67-0024-17 71-0085

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Appendix C















Diffusion type 0 to 30% VOL





able C-3 FX-SMTn Transmitters for Safe T Net ControllersGas Type Part Number Manual Insert P/N

Ammonia (NH3) 67-0025-09 71-0085

Arsine (AsH3) 67-0025-13 71-0085

Carbon monoxide (CO) 67-0025-01 71-0085

Chlorine (Cl2) 67-0025-04 71-0085

Chlorine dioxide (ClO2) 67-0025-16 71-0085

Diborane (B2H6) 67-0025-18 71-0085

Fluorine (F2) 67-0025-07 71-0085

Hydrogen chloride (HCl) 67-0025-05 71-0085

Hydrogen cyanide (HCN) 67-0025-08 71-0085

Hydrogen fluoride (HF) 67-0025-06 71-0085

Hydrogen sulfide (H2S) 67-0025-02 71-0085

Nitric oxide (NO) 67-0025-14 71-0085

Nitrogen dioxide (NO2) 67-0025-15 71-0085

Oxygen (O2) 67-0025-03 71-0085

Ozone (O3) 67-0025-12 71-0085

Phosphine (PH3) 67-0025-10 71-0085

Silane (SiH4) 67-0025-11 71-0085

Sulfur dioxide (SO2) 67-0025-17 71-0085

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able C-4 FX-IR Transmitters for Safe T Net ControllersGas Type Part Number Manual Insert P/N

Methane 67-0022-01 71-0084

Propane 67-0022-02 71-0084

Hexane 67-0022-03 71-0084

Documents

Safe T Net 2000 Operator’s Manual T Net 2000.pdf · 2 71-0019 - REV G Safe T Net 2000 Operator’s Manual Features • Accepts one or two channels of standard 4 to 20 mA analog